[Asterisk-Dev] Asterisk Forking Contacts?

[Conroy, Lawrence (SMTP)]

Hi Folks,
   for the more touchy list members, I apologise if they think
that this is the wrong list - I was in two minds myself.

Bjoern of Ingate raised the issue of Contact headers, and Olle
kindly pointed out that * is not a forking proxy (and asked for
sip2 feedback - duly noted, and will do).

The reflex answer to this is "use SER as a front end & Asterisk
as a back end for individual extensions and interface/channel cards".

However, this triggered a few random neural firings:
* is perfectly fine to act as a SIP proxy and in turn to register
with an external proxy. But...
I don't see how one can control that external registration so that
it isn't made if there is not a tied/associated "internal" registration
from a SIP UA to an * extension.

Thus (i) can this be done (i.e. trigger an external registration with a
remote server in response to an internal SIP extension registering with 
*)?
(ii) If not, then do we want to consider developing forking (i.e. 
multiple
registrations/bindings for a single extension), and how difficult is it?
It seems to me that something LIKE forking can be done with agent 
groups,
but there are pretty major differences, IMHO.

Forgive these random comments, but I'm really not sure.

all the best
   Lawrence

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